Added links to Perl documentation

web/regex_tester.html

@@ -603,6 +603,27 @@ my $x = "foo";  # example
 
 <pre id="perlinfo" style="margin-top:0.5em">perl v?, WebPerl v?</pre>
 
+<div style="margin-top:1em;font-size:0.8em">
+Perl Regular Expression Documentation:
+<a href="http://perldoc.perl.org/perlretut.html" target="_blank">Tutorial</a>,
+<a href="http://perldoc.perl.org/perlrequick.html" target="_blank">Quick Start</a>,
+<a href="http://perldoc.perl.org/perlre.html" target="_blank">Main (perlre)</a>,
+<a href="http://perldoc.perl.org/perlop.html#Regexp-Quote-Like-Operators" target="_blank">Operators</a>,
+<a href="http://perldoc.perl.org/perlvar.html#Variables-related-to-regular-expressions" target="_blank">Special Variables</a>,
+<a href="http://perldoc.perl.org/perlrebackslash.html" target="_blank">Backslash Sequences and Escapes</a>,
+<a href="http://perldoc.perl.org/perlrecharclass.html" target="_blank">Character Classes</a>,
+<a href="http://perldoc.perl.org/perlfaq6.html" target="_blank">FAQs</a>,
+<a href="http://perldoc.perl.org/perlreref.html" target="_blank">Quick Reference</a>,
+<a href="http://perldoc.perl.org/re.html" target="_blank">re Pragma</a>,
+<a href="http://perldoc.perl.org/functions/split.html" target="_blank">split</a>,
+<a href="http://perldoc.perl.org/perlreguts.html" target="_blank">Guts</a>,
+<a href="http://perldoc.perl.org/perldebguts.html#Debugging-Regular-Expressions" target="_blank">Debugging</a>;
+I18N:
+<a href="http://perldoc.perl.org/perlunicode.html" target="_blank">Unicode</a>
+(<a href="http://perldoc.perl.org/perlunicook.html" target="_blank">Examples</a>),
+<a href="http://perldoc.perl.org/perllocale.html" target="_blank">Locales</a>.
+</div>
+
 <div style="margin-top:1em;font-size:0.8em">
 Author, Copyright, and License: see
 <a href="https://github.com/haukex/webperl/blob/master/web/regex_tester.html" target="_blank">the source code of this file</a>.<br/>